1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
27 
28 #pragma weak getpagesizes = _getpagesizes
29 #pragma weak getpagesizes2 = _getpagesizes2
30 
31 #include "synonyms.h"
32 #include <sys/types.h>
33 #include <unistd.h>
34 #include <sys/syscall.h>
35 
36 /*
37  * mman.h contains "#pragma redefine_extname getpagesizes getpagesizes2".
38  * Applications that are still calling getpagesizes() instead of
39  * getpagesizes2() are 'legacy' applications that have not been recompiled
40  * since the #pragma redefine_extname change.
41  *
42  * Depending on the platform, 'legacy' applications may not be given the full
43  * set of supported page sizes to prevent them from inadvertantly using 'new'
44  * large pagesizes that might cause application failure or low system memory
45  * conditions.
46  *
47  * The first parameter to the SYS_getpagesizes syscall is effectively
48  * a 'legacy' boolean flag used as such in the kernel.
49  */
50 int
51 getpagesizes(size_t pagesize[], int nelem)
52 {
53 	return (syscall(SYS_getpagesizes, 1, pagesize, nelem));
54 }
55 
56 int
57 getpagesizes2(size_t pagesize[], int nelem)
58 {
59 	return (syscall(SYS_getpagesizes, 0, pagesize, nelem));
60 }
61